Network Router User Manual

It is, of course, also possible to use flexible topologies

when adding VDSL2 to an already existing site with

ECN330. With EDA 1200 there is always an efficient

upgrade path at hand when introducing new

technologies and solutions.

Transport

Ethernet over SDH

Operators with an Ethernet-based core network might

still have an existing Sonet/SDH-based infrastructure,

mostly to small and rural sites where the penetration of

bandwidth demanding services is not yet high. These

operators might wish to re-use spare capacity in the

Sonet/SDH infrastructure to carry Ethernet frames. The

Fast Ethernet to E1/T1 converter EXN104 makes this

possible. Other products covering the range of different

Sonet/SDH E3 and STM-1 interfaces are also available

from Ericsson.

Fast Ethernet to E1/T1 converter

EDA provides a cost-effective solution for transporting

Ethernet traffic via vacant E1/T1 lines, which is useful on

small sites. The stand-alone design of the IP DSLAM

removes the need for a back plane and subrack and

sets new standards for scalability and costs. This is

made possible by using the small, managed Fast

Ethernet to 4xE1/T1 converter (EXN104). A small Power

over Ethernet Node (EPN102) is available for power

feeding of both the IP DSLAM (EDN312x) and the

EXN104. All products provide a small scale ADSL

solution for remote sites down to 12 lines.

The EXN104 is typically used in a back-to-back

configuration as shown in the illustration below. But

aggregation of a number of EXN104 E1/T1s into a single

STM-1 is also possible using the implemented Cisco

Framing variant.

EXN104 supports up to four 120 Ω E1/T1 ports each

with a speed of 2 Mbps. EXN104 conforms to ITU-T

G.703 on the LSA® interface and is fully manageable

via SNMP from PEM.